County profile · official public datasets

Muscatine County, IA

144 public highway bridges tracked in the FHWA National Bridge Inventory: 34.7% rated Good, 43.8% Fair, 21.5% Poor.

144
Public bridges
34.7%
Good condition
21.5%
Poor condition

The verdict

According to the Federal Highway Administration's 2024 National Bridge Inventory.

Muscatine County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.

61st
of 99 on Poor share
21.5%
Poor-condition share
144
public highway bridges
1979
avg year built

Poor is an FHWA condition category from the lowest applicable component rating (4 or below), not a live crossing-safety or closure decision. Rankings cover counties with at least five public highway bridges.

Muscatine County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Muscatine County ranks #61 of 99 Iowa counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 21.5%). Muscatine County, Iowa contains 144 public highway bridges. Roughly 34.7% are rated “Good,” 43.8% “Fair,” and 21.5% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

Total bridges

144

Public highway bridges in Muscatine County

Good condition

34.7%

50 of 144 rated 7-9

Fair condition

43.8%

63 of 144 rated 5-6

Poor condition

21.5%

31 of 144 rated 4 or below

In-state Poor-share rank

#61 of 99

Among Iowa counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 144 NBI-tracked bridges by lowest applicable component rating.

Good
34.7% (50)
Fair
43.8% (63)
Poor
21.5% (31)

Muscatine County's Poor-condition bridges carry 22,216 vehicle crossings a day

That is 10.5% of the county's reported daily bridge traffic on 21.5% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 717 crossings a day against 1,582 for a Good-condition one. A Poor rating is a condition category, not a closure or a live safety judgement; it means the lowest applicable component rating is 4 or below.

Computed over the 144 of 144 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

43.8% of Muscatine County's bridges have passed the 50-year mark

63 of the 144 bridges with a recorded construction year were built in 1974 or earlier. Age alone is not a defect: a well-maintained older bridge can rate Good, and 34.7% of this county's inventory does. Even so, this older cohort is the population from which future Poor ratings are drawn, which is why the age profile below matters alongside the condition split above.

Cutoff derives from the 2024 release year minus a 50-year design life. Source: FHWA National Bridge Inventory, 2024 release.

One structure carries 13.9% of the county's Poor-condition bridge traffic

FM over WAPSI CREEK, built 1971, carries 3,080 vehicles a day, the most of any Poor-rated structure here. The county's Poor-condition exposure is concentrated rather than evenly spread, so the 31-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 22,216 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Muscatine County's bridges were built

144 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1970s, when 25 of the county's bridges still in the inventory were built, which is 17.4% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year (1979) matches the Iowa average (1979).

Source FHWA National Bridge Inventory (year built) As of 2024 NBI release

How Muscatine County compares with Iowa's closest counties by inventory size

The 5 Iowa counties nearest Muscatine County in number of bridges, with their condition splits. Its 21.5% Poor share is the 5th-lowest of these 6. Its average build year of 1979 against a peer-group mean of 1974 is 5 years newer.

Showing the 5 closest of 98 Iowa counties eligible for comparison.

Bridge inventory size and condition shares for Muscatine County and the 5 Iowa counties closest to it in inventory size
County Bridges Poor
Clay County 151 9.9%
Louisa County 151 16.6%
Muscatine County (this page) 144 21.5%
Hancock County 138 20.3%
Boone County 135 29.6%
Palo Alto County 135 18.5%

Each share is of that county's own total tracked bridges; peers are the counties with 5 or more bridges whose inventory size is closest to Muscatine County's. Source: FHWA National Bridge Inventory, 2024 release.

Nationwide counties with similar inventory size or average build year

Two NBI-derived peer sets for Muscatine County, both outside Iowa so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside IA (144 bridges here).

Similar average build year

Nearest mean year-built outside IA (1979 here).

Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.

All 144 Good 50 Fair 63 Poor 31

All bridges (144)

IA 22

Fair

Over: STREAM

2.9 mi. E of jct. IA #38, Muscatine, IA

Built 1967 Load: 39.0 t ADT: 1,730

US 6

Fair

Over: CEDAR RIVER

3.6 MI. W OF JCT. IOWA 38, Muscatine, IA

Built 1972 Load: 39.5 t ADT: 1,740

FM

Fair

Over: CEDAR RIVER

076040203, Muscatine, IA

Built 1997 Load: 39.5 t ADT: 550

IA 22

Fair

Over: STREAM

0.6 mi. W of SR Y36, Muscatine, IA

Built 1984 Load: 40.7 t ADT: 1,560

5TH ST

Fair

Over: MAD CREEK

000000000, Muscatine, IA

Built 2006 Load: 42.9 t ADT: 7,900

US 6

Fair

Over: SUGAR CREEK

1.6 MI. W OF W JCT IA 38, Muscatine, IA

Built 1973 Load: 44.4 t ADT: 1,740

IA 70

Fair

Over: DRAINAGE DITCH

0.4 MI. S OF JCT IOWA 22, Muscatine, IA

Built 1988 Load: 45.7 t ADT: 830

IA 70

Fair

Over: WAPSINONOC CREEK

1.1 MI. S OF JCT US 6, Muscatine, IA

Built 1988 Load: 50.1 t ADT: 2,660

LOCAL

Fair

Over: BIG SLOUGH CREEK

077040401, Muscatine, IA

Built 1989 Load: 52.7 t ADT: 47

CLAY ST

Fair

Over: MAD CREEK

000000000, Muscatine, IA

Built 1957 Load: 59.9 t ADT: 4,858

LOCAL

Fair

Over: CREEK

076031808, Muscatine, IA

Built 1951 Load: 69.3 t ADT: 15

FM

Fair

Over: SMALL STREAM

077021303, Muscatine, IA

Built 1950 Load: 84.4 t ADT: 320

FM

Fair

Over: SMITH RUN

076040105, Muscatine, IA

Built 1949 Load: 99.9 t ADT: 560

IA 22

Good

Over: DRAINAGE DITCH

1.0 mi. W of SR Y26, Muscatine, IA

Built 1984 Load: 23.3 t ADT: 1,730

IA 22

Good

Over: DRAINAGE DITCH

1.0 mi. E of jct. SR Y26, Muscatine, IA

Built 1984 Load: 25.3 t ADT: 1,730

IA 22

Good

Over: ROCK CREEK

2.1 mi. E of jct. Bus. 61, Muscatine, IA

Built 1984 Load: 30.5 t ADT: 3,050

US 6

Good

Over: WEST WAPSINONOC CREEK

0.2 MI. E OF SEC. RD. X34, Muscatine, IA

Built 2013 Load: 32.4 t ADT: 4,320

BURLINGTON RD

Good

Over: KINCAID CREEK

076020619, Muscatine, IA

Built 2015 Load: 32.4 t ADT: 260

180TH ST

Good

Over: PINE CREEK

077E11803, Muscatine, IA

Built 2016 Load: 32.4 t ADT: 45

SAULSBURY RD

Good

Over: CHICKEN CREEK

077030206, Muscatine, IA

Built 2013 Load: 32.4 t ADT: 145

N ISETT AVE

Good

Over: SMALL CREEK

078023502, Muscatine, IA

Built 2019 Load: 32.4 t ADT: 100

LOCAL

Good

Over: DRAINAGE DITCH 2

076040601, Muscatine, IA

Built 2004 Load: 32.7 t ADT: 15

LOCAL

Good

Over: PIKE RUN CREEK

077030903, Muscatine, IA

Built 2003 Load: 32.7 t ADT: 40

LOCAL

Good

Over: YELLOW CREEK

077031704, Muscatine, IA

Built 2004 Load: 32.7 t ADT: 60

FM

Good

Over: HONEY CREEK

077042901, Muscatine, IA

Built 2003 Load: 32.7 t ADT: 20

110TH ST

Good

Over: CREEK

078010901, Muscatine, IA

Built 2010 Load: 32.7 t ADT: 227

110TH ST

Good

Over: CREEK

078011001, Muscatine, IA

Built 2011 Load: 32.7 t ADT: 227

LOCAL

Good

Over: CREEK

078012604, Muscatine, IA

Built 1996 Load: 32.7 t ADT: 82

LOCAL

Good

Over: CREEK

078023206, Muscatine, IA

Built 2004 Load: 32.7 t ADT: 80

FM

Good

Over: CREEK

078041503, Muscatine, IA

Built 2001 Load: 32.7 t ADT: 890

FM

Good

Over: SMALL STREAM

078041506, Muscatine, IA

Built 2001 Load: 32.7 t ADT: 850

FM

Good

Over: GOSHIEN DRAINAGE DITCH

078043601, Muscatine, IA

Built 2010 Load: 32.7 t ADT: 110

US 61 NB

Good

Over: MUSCATINE SLOUGH

6.7 mi. N of S Jct IA 92, Muscatine, IA

Built 2002 Load: 32.7 t ADT: 3,500

US 61 SB

Good

Over: MUSCATINE SLOUGH

6.7 mi. N of S Jct IA 92, Muscatine, IA

Built 2002 Load: 32.7 t ADT: 3,500

HOLLY AVE

Good

Over: GOSHEN DRAINAGE DITCH

078032002, Muscatine, IA

Built 2023 Load: 33.4 t ADT: 25

150TH ST

Good

Over: LITTLE MOSQUITO CREEK

078013101, Muscatine, IA

Built 2023 Load: 33.7 t ADT: 30

120TH ST

Good

Over: CREEK

078041601, Muscatine, IA

Built 2020 Load: 34.3 t ADT: 91

F70 155TH ST

Good

Over: SMALL CREEK

078043501, Muscatine, IA

Built 2019 Load: 34.3 t ADT: 110

110TH ST

Good

Over: CREEK

078E11201, Muscatine, IA

Built 2018 Load: 34.7 t ADT: 176

LINDLE AVE

Good

Over: CREEK

077020604, Muscatine, IA

Built 2017 Load: 35.3 t ADT: 82

135TH ST

Good

Over: BRANCH OF MUD CREEK

078E12203, Muscatine, IA

Built 2023 Load: 36.0 t ADT: 91

DOUGLAS AVE

Good

Over: PIKE DRAINAGE DITCH

077040306, Muscatine, IA

Built 2021 Load: 36.3 t ADT: 91

US 61 & IA 22

Good

Over: MAD CREEK

0.5 MI. S OF JCT. IA 38, Muscatine, IA

Built 1984 Load: 36.6 t ADT: 18,300

YORK AVE

Good

Over: MUD CREEK

078010102, Muscatine, IA

Built 2022 Load: 38.6 t ADT: 82

IA 22

Good

Over: CEDAR RIVER

2.7 mi. E of E Jct. IA 70, Muscatine, IA

Built 1987 Load: 39.5 t ADT: 3,650

LOCAL

Good

Over: DD 2

076040703, Muscatine, IA

Built 2010 Load: 39.9 t ADT: 51

US 61

Good

Over: HERSHEY AVE

At Jct. of SR G28, Muscatine, IA

Built 2008 Load: 39.9 t ADT: 12,100

200TH ST

Good

Over: MUD CREEK

078E10507, Muscatine, IA

Built 2008 Load: 40.5 t ADT: 3,100

IA 22

Good

Over: OVER RR SPUR (IPSCO)

1.2 mi. W of Jct. SR Y36, Muscatine, IA

Built 1996 Load: 40.6 t ADT: 1,490

FM

Good

Over: PINE CREEK

077E10702, Muscatine, IA

Built 2008 Load: 41.7 t ADT: 200

Read our methodology - how this data is sourced, computed, and verified.

Related

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.